XMLHttpRequestEventTarget.onprogress

The XMLHttpRequestEventTarget.onprogress is the function called periodically with information when an XMLHttpRequest before success completely .

Syntax

XMLHttpRequest.onprogress = callback;

Values

• callback is the function called periodically before complete the request.

Event

• event.loaded how many information recived in periodically call.
• event.size how many information the request have.

XMLHttpRequest.onprogress = function (event) {
  event.loaded;
  event.size;
};

Example

var xmlhttp = new XMLHttpRequest(),
  method = 'GET',
  url = 'https://developer.mozilla.org/';

xmlhttp.open(method, url, true);
xmlhttp.onprogress = function () {
  //do something 
};
xmlhttp.send();

Specifications

Specification	Status	Comment
XMLHttpRequest	Living Standard	WHATWG living standard

Browser compatibility

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	1	1.0 (1.7 or earlier)	7	(Yes)	1.2

Feature	Android	Chrome for Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	?	1.0	(Yes)	?	?	?